MCQ Aldehydes and Ketones, Class 12 Chemistry

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. 2HCHO + NaOH → CH₃OH + HCOONa
The above reaction is known as:

Wurtz reaction

Cannizzaro reaction

Frankland reaction

Rosenmund’s reaction

Your comments:

Question 1 of 20

2. Base catalysed aldol-condensation occurs with:

Propionaldehyde

2,2-Dimethylpropionaldehyde

Benzaldehyde

2-methylpropionaldehyde

Your comments:

Question 2 of 20

3. Two molecules of formaldehyde reacts with conc. KOH to give:

Ethanol

Ethanoic acid

Esters

Methanol

Your comments:

Question 3 of 20

4. When an aldehyde is heated with Fehling's solution, the latter is reduced to give a red ppt of:

Silver mirror

Acetic acid

Cuprous oxide

Silver hydroxide

Your comments:

Question 4 of 20

5. Fehling's solution is:

Copper acetate + Sodium citrate

Acidified CuSO₄ solution

Ammoniacal CuSO₄ solution

CuSO₄+ Rochelle salt

Your comments:

Question 5 of 20

6. Which one of the following reagent can distinguish aldehydes and ketones?

Fehling's solution

NaHSO₃

H₂SO₄ solution

NH₃

Your comments:

Question 6 of 20

7. When benzaldehyde is nitrated we get:

p-Nitrobenzaldehyde

m-Nitrobenzaldehyde

m-hydroxybenzaldehyde

o-Nitrobenzaldehyde

Your comments:

Question 7 of 20

8. Reduction of carbonyl group into –CH₂ in presence of Zn-Hg/HCl is an example of:

Kolbes reaction

Clemmensen reduction

Rosenmunds reduction

Wolff-Kishner Reduction

Your comments:

Question 8 of 20

9. Which statement is incorrect in case of acetaldehyde and acetone?

Both react with hydroxyl amine

Both react with NaHSO₃

Both react with hydrazine

Both reduce ammoniacal silver nitrate

Your comments:

Question 9 of 20

10. The formation of cyanohydrin from ketone is an example of:

Nucleophilic substitution reaction

Electrophilic addition reaction

Electrophilic substitution reaction

Nucleophilic addition reaction

Your comments:

Question 10 of 20

11. Acetyl chloride when treated with dimethyl cadmium it gives:

Acetaldehyde

Acetophenone

Acetic acid

Acetone

Your comments:

Question 11 of 20

12. Iodoform test is used for the test of which of the following functional groups?

Carboxylic acids

Aldehydes

Ketones

Methyl ketones

Your comments:

Question 12 of 20

13. Arrange the following in decreasing order of their reactivity towards nucleophilic addition reaction.
CH₃COCH₃, CH₃CH₂CHO, HCHO, (CH₃)₂CHCHO

HCHO > CH₃CH₂CHO > (CH₃)₂CHCHO > CH₃COCH₃

HCHO > CH₃COCH₃ > CH₃CH₂CHO > (CH₃)₂CHCHO

CH₃COCH₀ > (CH₃)₂CHCHO > HCHO > CH₃CH₂CHO

(CH₃)₂CHCHO > CH₃COCH₃ > HCHO > CH₃CH₂CHO

Your comments:

Question 13 of 20

14. Rosenmund's reduction of an acyl chloride gives:

hydrocarbon

an alcohol

an ester

an aldehyde

Your comments:

Question 14 of 20

15. Oxidation of aldehyde gives:

Ketone

Phenol

Amine

Acid

Your comments:

Question 15 of 20

16. Which of the following reagent reacts with aldehyde to give silver mirror test?

Potassium nitrate solution

Benedict's solution

Tollen's reagent

Fehling's solution

Your comments:

Question 16 of 20

17. Which of the following does not undergo Aldol condensation?

Methanal

Ethanal

Propanal

Propanone

Your comments:

Question 17 of 20

18. Which of the following reaction takes place in aldehydes and ketones?

Electrophilic addition reaction

Nucleophilic substitution reaction

Nucleophilic addition reaction

Electrophilic substitution reaction

Your comments:

Question 18 of 20

19. A compound that gives positive iodoform test is:

1-Pentanol

3-Pentanone

Pentanal

2-Pentanone

Your comments:

Question 19 of 20

20. Reaction of acetone with formaldehyde in presence of base is an example of:

Reimer-Tiemann reaction

Crossed-aldol condensation

Cannizaro reaction

Aldol condensation

Your comments:

Question 20 of 20

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